Effect of partial replacement of carbon by nitrogen on intergranular corrosion behavior of high nitrogen martensitic stainless steels

作     者：Wei-Chao Jiao Hua-Bing Li Jing Dai Hao Feng Zhou-Hua Jiang Tao Zhang Da-Ke Xu Hong-Chun Zhu Shu-Cai Zhang 

作者机构：School of MetallurgyNortheastern UniversityShenyang 110819China Corrosion and Protection DivisionShenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang110819China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2019年第35卷第10期

页      面：2357-2364页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China [grant numbers 51434004, U1435205, 51774074] Fundamental Research Funds for the Central Universities [N172512033, N172507002] Transformation Project of Major Scientific and Technological Achievements in Shenyang [grant number Z17-5-003] 

主　　题：High nitrogen martensitic stainless steels Precipitation Intergranular corrosion DL-EPR 

摘      要：The microstructure evolution and intergranular corrosion(IGC) behavior of high nitrogen martensitic stainless steels(MSSs) by partial replacing C by N were investigated by using microscopy, X-ray diffraction, nitric acid tests and double-loop electrochemical potentiokinetic reactivation(DL-EPR) tests. The results show that the partial replacement of C by N first reduces and then increases the size and content of precipitates in high nitrogen MSSs, and converts the dominant precipitates from M23C6 to M2N,furthermore first improves and then deteriorates the IGC resistance. The high nitrogen MSS containing medium C and N contents provides good combination of mechanical properties and IGC resistance.